Note 16 - Branch Acquisition - Assessment of Consideration Transferred, Assets Purchased, and Liabilities Assumed (Details) - Bank of America Branches [Member] - USD ($) $ in Thousands	Mar. 11, 2016	Mar. 31, 2016
Cash paid	$ 6,656
Total consideration	6,656
Cash and cash equivalents	149,067
Premises and equipment, net	4,190
Other assets	201
Core deposit intangible	1,772
Total assets acquired	155,230
Deposits	149,047
Other liabilities	192
Total liabilities assumed	149,239
Net identifiable assets acquired over liabilities assumed	5,991
Goodwill	665	$ 665
Portion at Other than Fair Value Measurement [Member]
Cash paid
Total consideration
Cash and cash equivalents	149,067
Premises and equipment, net	1,835
Other assets	201
Core deposit intangible
Total assets acquired	151,103
Deposits	149,047
Other liabilities	20
Total liabilities assumed	149,067
Net identifiable assets acquired over liabilities assumed	2,036
Goodwill
Changes Measurement [Member]
Cash paid
Total consideration
Cash and cash equivalents
Premises and equipment, net	2,355
Other assets
Core deposit intangible	1,772
Total assets acquired	4,127
Deposits
Other liabilities	172
Total liabilities assumed	172
Net identifiable assets acquired over liabilities assumed	3,955
Goodwill